Arizona Public Service is reporting that more than 1,300 customers are without power Wednesday morning.

The affected area is between Roosevelt and Madison streets on the north and south and 40th to 52nd streets on the east and west in metro Phoenix.

The outage was first reported just after 4:15 a.m.

The APS outage map described the cause as a “service interruption to a major power line,” but no other details were immediately available.

APS said it had a troubleman at the site. Troublemen are the ones who investigate and determine the cause of a power outage.

"If the problem is local to a certain area, the electrical troubleman will find it," explains PowerJobsDirect.com. "If it's not, he or she will continue to follow it back to its source until he finds the problem."

According to its outage map, the utility hopes to have everything back up and running by 7:30 a.m.

Founded in 1886, APS is the largest electric utility in the state serving 2.7 million Arizonans and employing more than 6,400 people.